<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Barcode
 * @subpackage Object
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Code25interleaved.php 23775 2011-03-01 17:25:24Z ralph $
 */

/** @see Zend_Barcode_Object_Code25 */
require_once 'Zend/Barcode/Object/Code25.php';

/** @see Zend_Validate_Barcode */
require_once 'Zend/Validate/Barcode.php';

/**
 * Class for generate Interleaved 2 of 5 barcode
 *
 * @category   Zend
 * @package    Zend_Barcode
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Barcode_Object_Code25interleaved extends Zend_Barcode_Object_Code25 {
	/**
	 * Drawing of bearer bars
	 * @var boolean
	 */
	private $_withBearerBars = false;
	
	/**
	 * Default options for Code25interleaved barcode
	 * @return void
	 */
	protected function _getDefaultOptions() {
		$this->_barcodeLength = 'even';
	}
	
	/**
	 * Activate/deactivate drawing of bearer bars
	 * @param boolean $value
	 * @return Zend_Barcode_Object_Int25
	 */
	public function setWithBearerBars($value) {
		$this->_withBearerBars = ( bool ) $value;
		return $this;
	}
	
	/**
	 * Retrieve if bearer bars are enabled
	 * @return boolean
	 */
	public function getWithBearerBars() {
		return $this->_withBearerBars;
	}
	
	/**
	 * Width of the barcode (in pixels)
	 * @return integer
	 */
	protected function _calculateBarcodeWidth() {
		$quietZone = $this->getQuietZone ();
		$startCharacter = (4 * $this->_barThinWidth) * $this->_factor;
		$characterLength = (3 * $this->_barThinWidth + 2 * $this->_barThickWidth) * $this->_factor;
		$encodedData = strlen ( $this->getText () ) * $characterLength;
		$stopCharacter = ($this->_barThickWidth + 2 * $this->_barThinWidth) * $this->_factor;
		return $quietZone + $startCharacter + $encodedData + $stopCharacter + $quietZone;
	}
	
	/**
	 * Prepare array to draw barcode
	 * @return array
	 */
	protected function _prepareBarcode() {
		if ($this->_withBearerBars) {
			$this->_withBorder = false;
		}
		
		// Start character (0000)
		$barcodeTable [] = array (1, $this->_barThinWidth, 0, 1 );
		$barcodeTable [] = array (0, $this->_barThinWidth, 0, 1 );
		$barcodeTable [] = array (1, $this->_barThinWidth, 0, 1 );
		$barcodeTable [] = array (0, $this->_barThinWidth, 0, 1 );
		
		// Encoded $text
		$text = $this->getText ();
		for($i = 0; $i < strlen ( $text ); $i += 2) { // Draw 2 chars at a time
			$char1 = substr ( $text, $i, 1 );
			$char2 = substr ( $text, $i + 1, 1 );
			
			// Interleave
			for($ibar = 0; $ibar < 5; $ibar ++) {
				// Draws char1 bar (fore color)
				$barWidth = (substr ( $this->_codingMap [$char1], $ibar, 1 )) ? $this->_barThickWidth : $this->_barThinWidth;
				
				$barcodeTable [] = array (1, $barWidth, 0, 1 );
				
				// Left space corresponding to char2 (background color)
				$barWidth = (substr ( $this->_codingMap [$char2], $ibar, 1 )) ? $this->_barThickWidth : $this->_barThinWidth;
				$barcodeTable [] = array (0, $barWidth, 0, 1 );
			}
		}
		
		// Stop character (100)
		$barcodeTable [] = array (1, $this->_barThickWidth, 0, 1 );
		$barcodeTable [] = array (0, $this->_barThinWidth, 0, 1 );
		$barcodeTable [] = array (1, $this->_barThinWidth, 0, 1 );
		return $barcodeTable;
	}
	
	/**
	 * Drawing of bearer bars (if enabled)
	 *
	 * @return void
	 */
	protected function _postDrawBarcode() {
		if (! $this->_withBearerBars) {
			return;
		}
		
		$width = $this->_barThickWidth * $this->_factor;
		$point1 = $this->_rotate ( - 1, - 1 );
		$point2 = $this->_rotate ( $this->_calculateWidth () - 1, - 1 );
		$point3 = $this->_rotate ( $this->_calculateWidth () - 1, $width - 1 );
		$point4 = $this->_rotate ( - 1, $width - 1 );
		$this->_addPolygon ( array ($point1, $point2, $point3, $point4 ) );
		$point1 = $this->_rotate ( 0, 0 + $this->_barHeight * $this->_factor - 1 );
		$point2 = $this->_rotate ( $this->_calculateWidth () - 1, 0 + $this->_barHeight * $this->_factor - 1 );
		$point3 = $this->_rotate ( $this->_calculateWidth () - 1, 0 + $this->_barHeight * $this->_factor - $width );
		$point4 = $this->_rotate ( 0, 0 + $this->_barHeight * $this->_factor - $width );
		$this->_addPolygon ( array ($point1, $point2, $point3, $point4 ) );
	}
}
